Henry m



(No Model.)

H. M. LAMBERT.

v DESK HINGE. No. 562,901. Patented June 30, 18 96.

i i l UNITED STAT S PATENT OFFICE.

HENRY M. LAMBERT, OF PORTLAND, OREGON, ASSIGNOR OF ONE-HALF TO MARTIN XV. PARELIUS, OF SAME PLACE.

.DES'K-HINGE.

SPECIFICATION forming part of Letters Patent No. 562,901, dated June 30, 1896.

Application filed November 12, 1894. Serial No. 528,580. (No model.)

To all whom it may concern.-

Be it known that LHENRY M. LAMBERT, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and Improved Desk-Hinge, of which the following is a specification.

My invention, which relates more particularly to an improved hinge for school-desks, primarily has for its object to provide a hinge IQ of this kind of a very few parts simply arranged and of economical construction and so disposed and connected as to prevent jarring or unnecessary noise as the seat is moved up or down.

With other objects in view,which will hereinafter appear, my invention consists in the novel arrangement and peculiar combination of parts, as will be first described in detail, and then be specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a side view of the seat-standard, the seat, the hingejoint, anda portion of the seat-back. Fig. 2 is a perspective View of 2 5 the seat-arm and its hinge or knuckle portion. Fig. 3 is a similar view of the standard and its rigid knuckle portion. Fig. 4 is a view of the said standard and knuckle as seen from the opposite side. Fig. 5 is a vertical section 0 of the seat-standard, the knuckle-hinge, the

securing devices, and the seat-arm,the several parts being detached to more clearly illustrate the construction thereof. Figs. 6 and 7 are perspective views of the cap member for the hinge as seen from opposite sides. Fig.

Sis a perspective view of the spring-plate hereinafter referred to, and Figs. 9 and 10 are views of several of the parts hereinafter specifically referred to.

Referring to the accompanying drawings, A indicates the seat-standard, the upper end of which has an integral knuckle portion A, the construction of which is best illustrated in Figs. 3 and i, by reference to which it will 5 be seen that the inner face is fiat and has two elevated surfaces a, provided with beveled approaches a at each end, and a central concave recess 5 and aperture 1), for a purpose presently explained.

The outer face of the knuckle portion A has an annular groove 0 and a fiat elevated circular portion 0' around the aperture 1), which forms a seat for the spring-plate (Z. (Shown in detail in Fig. 8.

That portion of the hinge which is cast rig- 5 5 idly with the seat arm consists of a flat knuckle member F, (see Fig. 2,) having asemispherical hub f and a tapering hole f adapted to receive the head of the screw-bolt G. This member or knuckle F is also provided with alternate depressed and elevated portions f and f respectively, the elevated surfaces also having beveled approaches f of similar construction as those in knuckle A, with which the knuckle F cooperates.

The knuckle members A and F are relatively so constructed as to fit into each other, the elevated portions a of the former being adapted to seat in the depressed portions f of the latter, and vice versa, the correlation of such parts being clearly illustrated in Fig.

5 of the drawings.

H. indicates a cap member, which has a quadrangular seat or depression 72. at its inner side and a smaller similar depression h on the outer side, in which a nut'i is adapted to seat, while the depression 71. is provided to receive a spring-plate (2. (Shown in perspective in Fig. 8.)

So far as described and referring to Fig. 5, it will be readily seen that by inserting the screw-bolt G from one side, with its head to fit the beveled portion f and with its shank passed through the several central apertures, and seating the nut i in the depression h, by 8 5 tightening the screw-bolt the several parts will be securely held together, the plate d forming a tension member to hold the several parts secure and from rattling, the tapering or central hole of the knuckle F being so constructed as to bind upon the head of the screwbolt and prevent the same from becoming loose after having been inserted in the nut.

' By reference to Figs. 2 and 3 it will be seen that'the elevated portions of knuckles A and 5 F are narrower than the depressed portions of such knuckles, so as to allow for moving the seat back and .forth. By this construction it is manifest that should the seat-arm be in the position shown in Fig. 1, and were the same pushed back, the beveled ends of the elevated portions 0. and f would engage with each other and resist suclrbackward movement, such resistance increasing as the said beveled portions reach the limit of their movement, and thereby prevent the seat from being violently thrown back, and reducing to a minimum unnecessary noise and wear.

To still further render my improved hinge noiseless, a segment is cut ofi the knuckle A, as indicated by 6, (see Fig. 3,) on which aflat spring J, carried by the knuckle F, is adapted to bear, as clearly illustrated in Figs. 9 and 10, such spring J being rigidly held from displacement by en gaging notches or seats f in the circular rim of the knuckle, as shown. By this arrangement of spring device it is manifest that when the seat is turned the spring as it passes from its fiat bearing condition on the part c of the knuckle A will be compressed, and thereby forming, as it were, a tight frictional contact of the two knuckle members and preventing any possibility of rattling.

To rigidlyhold the cap H in place, the same is provided with two similar lugs K K, adapted to fit depressions Z and Z in the knuckles F on the seat-arm, as clearly shown in the drawings.

From the foregoing description, taken in connection with the accompanying drawings, it is thought the advantages of my improvement will be readily appreciated by those skilled in the art to which it appertains. By the peculiar arrangement of parts, cooperating in the manner described, the bearing parts of the hinge are under continual restraint, and rendered noiseless and durable, thereby producing a hinge especially desirable for use for school-seats and other like furniture.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a hinge connection substantially as described, the combination with the fixed knuckle member A, having raised portions and depressed portions, and a cut-off portion 6, of the knuckle member F, having raised and depressed bearing portions, and an an nular projecting rim, and a fiat spring J, held under such rim, the cap member 11, and the bolt and nut devices G, and i, all arranged substantially as shown and for the purposes described.

2. In a hinge connection substantially as described, the combination with the fixed knuckle member having raised and depressed portions and having afiat peripheral bearing portion, vo1": the movable knuckle member. having raised and depressed portions to engage the bearing-face of the fixed member said movable knuckle having a flat spring member adapted to normally seat on the fiat peripheral portion of the fixed member, and means for pivotally clamping the fixed and movable knuckle members together as specified.

3. As an improvement in hinges of the kind described, the combination with the knuckle member A, having raised and depressed portions and a flat peripheral bearing portion of the knuckle member F, having an outwardly-projecting hub f, having notches Z, and a flat spring J, held on the inner face of the hub, the cap-plate H, having radial lugs K, K, adapted to fit the notches Z, Z, and the interposed spring-plate d, and the nut and bolt devices G and z', for pivotally joining the knuckles A F, and the cap-plate, all arranged substantially as shown and for the purposes described.

In testimony whereof I have hereunto set my signature in the presence of two witnesses.

HENRY M. LAMBERT. WVitnesses:

A. T. LEWIS, M. IV. PARELIUS. 

